Improvement in operating fan tremolos



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JOSEPH H. DOW, OF BIRMINGHAM, CONNECTICUT, ASSIGNOR TO HIMSELF AND DARIUS WILCOX, OF SAME PLA CE.

Letters Patent No. 102,096, dated Apr/il 19, 1870.

IIWPROVEMENT IN OPERATING PAN TREMOLOS.

The Schedule referred to in these Letters Patent and making part of the same.

Tav all whom it may con-cern:

Be it known thatI, JOSEPH H. Dow, of Birmingham, in the'county of New Haven and State of Connecticut, have invented a new Improvement in Operating Fan Trelnolos; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact desoription of the same, and which said drawings constitute part of this specification, and represent in Figure 1 a front view;

Figure 2, a top view, a portion of the case removed to show the mechanism;

Figure 3, a partial sectional view enlarged; and iu Figure 4, a transverse section.

This invention relates to an improvement in mechanism for operating the tremolo of reed instruments, the object being to apply the power through one of the pedals which operates the bellows or feeder of the instrument.

A is the case, of vcommon construction, below the wind-chest, that portion being here removed for the purpose of more clearly illustrating the operation of the invention.

B is one bellows or feeder, C, the other, operated respectively by pedals B andC' in the usual manner.

The feeder B iscounected to its pedal by a shaft, D, a baud, d, attached to the shaft and pedal, and a band, d', from the shaft to the bellows, as seen in gs. 1, 2, and 4, so that, as the pedal is depressed, the shaft D partially revolves by the unwinding of the band ,d therefrom, and the band d winding on to the shaft opens the bellows. The object of this connection is to cause the revolution or rotation of the shaft D. v

The shaft D is constructed as seen in lig. 3, so as by its revolution to create power.

E is a second shaft arranged axially to the shaft D, and upon which is fixed a friction-wheel, F.

On the shaft D an arm, G, extends out, and is attached to a band around the wheel F, `so that as the shaft D revolves, the arm G will draw the band tightly upon the wheel F, so as to cause the wheel F to turn with the shaft.

This band and its connection to the arm G is in the usual manner of friction-bauds or clutches, the friction-band extending over only a part of the-wheel On the other part of the wheel another baud is arranged to prevent the return of the wheel after it has been advanced bythe turning of the arm G. This construction is also common in friction-clutches for other purposes.

Therefore, by the turning of the shaft D the wheel F is turned with it, and when the shaft D returns the wheel F is held to prevent its return, so that the clamping device goes back to take a new hold.

On the shaft E a pulley, H, is arranged loose upon the shaft, and to the said pulley a barrel spring, I, is fixed, one end 0f the spring being fixed in the barrel, the other end to the shaft E, so that the pulley H being held, the shaft E turning will wind the spring, consequently, so soon as the spring shall have been wound with sutlicient power, the pulley H will revolve. l

From the pulley H a band extends to the shaft I N of the tremolo, as seen in figs. l and 4, the tremolo being arranged iu the usual manner in the windchest. y

As it is not at all times desirable that the tremolo be iu operation, I arrange a shaft, P, see figs. 2 and 4, and connect the shaft P with a knee-stop, R, see g. 2, so that, by turning the knee-stopto the posi-l tion denoted iu broken lines, fig. 2, the shaft P is partially turned.

On the shaft P a spring-lever, S, is arranged, so as to bear upon the pulley H, and the turning of the shaft P raises the spring S from the pulley, the force of the spring S being suficient tohold the pulley when bearing upon it and prevent its turning.

The clutch or baud which holds the wheel F when turned, is also connected by an arm, T, see iig. 2, to the shaft P, so that when the spring S is bearing` upon the pulley the friction-band is loosed upon' the wheel F, but when the spring S is raised then the friction-band is tightened, the shaftP in turning drawing up' the band by means of the arm T; therefore, when the shaft I is free, and thespring S bearing upon the pulley, the wheel F rotates back and forth with the shaft D; but when the shaft P is turned to loose the spring S and raise the arm T, then the wheel F is advanced with the shaft D, winding the spring, and held while the shaft returns for a new hold; therefore, whenever the tremolo is required, press the knee-stop to the left to free the pulley H from the spring S, and tighten the baud ou the friction-wheel, and the tremolo immediately revolves, and when the knee-stop is ,permitted to return the tremolo instantly stops.

It is desirable when the tremolo is in operation that the bellows or feeder should not operate, and while the treadle may be disconnected in various ways to prevent the operation of the bellows, I prefer to prevent the operation by holding open the valve f, and this I do by connecting the shaft l with a lever, n, see fig. l, through a rod, fm, and the other end of the lever n by another rod, t, to the said valve, as seen iu figs. 1 andA 2, so that by the turning of shaft VP the valve f is open and held open until the shaft is returned.

the pedal B to the tremolo-shaft N, the arrangement,

` substantially such as described, to open or release the bellows or feeder from the action of the pedal while the tremolo is in operation.

' JOSEPH H. DOW.

Witnesses:

S. M. GARDNER, JOSEPH ToMLIXsoN. 

